<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../引入vue3.js"></script>
</head>

<body>
    <div id="app">
        <ul>
            <li v-for="item in list " :key="item">
                {{item}}
            </li>
        </ul>
        <button @click="click">click</button>
    </div>
</body>
<script>
    var obj = {
        data() {
            return {
                list: ['a', 'b', 'c', 'd']
            }
        },
        methods: {
            click() {
                this.list[0] = '剑圣';
            }
        }
    }
    Vue.createApp(obj).mount('#app');

    
</script>

</html>